Fourteen Weeks in Descriptive Astronomy |
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Page 30
... bright stars , as he considered them , which were invisible to the naked eye . The next night he noticed that those stars had changed their relative positions . Aston- ished and perplexed , he waited three days for a fair night in which ...
... bright stars , as he considered them , which were invisible to the naked eye . The next night he noticed that those stars had changed their relative positions . Aston- ished and perplexed , he waited three days for a fair night in which ...
Page 36
... bright star happens to be directly overhead , it can be seen with the naked eye even at midday . In this way it is said a celebrated optician was first led to think of there being stars by day as well as by night . One half of the ...
... bright star happens to be directly overhead , it can be seen with the naked eye even at midday . In this way it is said a celebrated optician was first led to think of there being stars by day as well as by night . One half of the ...
Page 60
... Bright ridges or streaks appear , which constitute the most brilliant por- tions of the sun . These are called fa- culo . They vary FACULE . from barely discern- ible , softly - gleaming tracts 1,000 miles long , to lofty , piled - up ...
... Bright ridges or streaks appear , which constitute the most brilliant por- tions of the sun . These are called fa- culo . They vary FACULE . from barely discern- ible , softly - gleaming tracts 1,000 miles long , to lofty , piled - up ...
Page 64
... bright as its centre . KIRCHHOFF'S THEORY . - This view differs essentially from that of Wilson . It considers the sun as an intensely white - hot solid or fluid body surrounded by a dense atmosphere of flame , filled with sub- stances ...
... bright as its centre . KIRCHHOFF'S THEORY . - This view differs essentially from that of Wilson . It considers the sun as an intensely white - hot solid or fluid body surrounded by a dense atmosphere of flame , filled with sub- stances ...
Page 83
... bright sparkling star , near the western horizon . Its elevation increases evening by evening , but never exceeds 30 ° . * If we watch it closely , we shall find that it again ap- * This distance varies much , owing to the eccentricity ...
... bright sparkling star , near the western horizon . Its elevation increases evening by evening , but never exceeds 30 ° . * If we watch it closely , we shall find that it again ap- * This distance varies much , owing to the eccentricity ...
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Common terms and phrases
ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac